Question

u. a) Name the type of the accessory respiratory
Organ in each of the following fishes:
Amphipnous :-
Anabas
ophiocephalus
saccobranchus-
Clarias​

Answer 1

Here's your answer..hope it helps

1) In cuchia eel, Amphipnous cuchia, the accessory respiratory organs consist of a pair of vascular sac-like diverticula from the pharynx above the gills. These diverticula open anteriorly into first gill-slit. These diverticula function physiologically as the lungs.

2) The accessory respiratory organs of Anabas testudineus consists of the following structures:

=> the supra-branchial chamber,

=> the labyrinthine organ, and.

=> the respiratory membrane.

2(a) Anabas Testudineus:

The Indian climbing perch has two, spacious, suprabranchial cavities as dorsal outgrowths of the two gill-chambers. Each cavity contains a special labyrinthine organ formed of much folded, concentric bony plates developed from the first epibranchial bone and covered with thin vascular mucous membrane. Margins of these plates are wavy and the plates are covered with vascular gill-like epithelium.

Each branchial outgrowth communicates freely not only with the opercular cavity but also with buccopharyngeal cavity. Air is drawn through mouth into suprabranchial cavities and expelled through opercular opening. The fish is so dependent on atmospheric oxygen that it will drown if denied access to surface to gulp air.

3) Heteropneustes Fossilis (= Saccobranchus):

This Indian catfish has a pair of long, tubular and dorsally situated air-sacs, arising posteriorly from gill-chambers and extending almost up to the tail. They are highly vascular. The air is drawn in and expelled out through pharynx.

P.S. I can't find more but this website might be useful in topicsw related to the mentioned question

https://www.notesonzoology.com/phylum-chordata/fishes/accessory-respiratory-organs-of-fishes-with-diagram-chordata-zoology/8057